Home / 20,140.88-30,229.77-10,287.08

Finding the Fourth Proportional to 20,140.88, 30,229.77 and 10,287.08

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Solution

The fourth proportional to 20,140.88, 30,229.77 and 10,287.08 is: 15,440.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.88 : 30,229.77 = 10,287.08 : x
  2. Step 2: Convert to fraction form
    20,140.88/30,229.77 = 10,287.08/x
  3. Step 3: Cross multiply
    20,140.88x = 30,229.77 × 10,287.08
  4. Step 4: Simplify right side
    20,140.88x = 310,976,062.37
  5. Step 5: Solve for x
    x = 310,976,062.37/20,140.88
  6. Step 6: Final answer
    x = 15,440.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.